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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
18.6k
Companies
980
Updated
11.12.2026
18.6k Questions 980 Companies11.12.2026
PLTCHK testimonial
PLTCHK

"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"

_The_TaNk_ testimonial
_The_TaNk_

"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"

Chris testimonial
ChrisSenior SWE, LinkedIn

"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."

sleepy33 testimonial
sleepy33

"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."

Jake testimonial
JakeSenior ML Engineer, Lyft

"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."

nuggetlord testimonial
nuggetlord

"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."

Carlos testimonial
CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes testimonial
boba.tea.vibes

"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."

Andy testimonial
AndySWE-II, Google

"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."

couchpotato99 testimonial
couchpotato99

"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."

Shruti testimonial
ShrutiData Engineer, Salesforce

"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."

midnightramen testimonial
midnightramen

"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."

Bianca testimonial
BiancaFrontend Eng, Figma

"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."

tambrahm007 testimonial
tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa testimonial
toa

"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."

PLTCHK testimonial
PLTCHK

"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"

_The_TaNk_ testimonial
_The_TaNk_

"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"

Chris testimonial
ChrisSenior SWE, LinkedIn

"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."

sleepy33 testimonial
sleepy33

"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."

Jake testimonial
JakeSenior ML Engineer, Lyft

"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."

nuggetlord testimonial
nuggetlord

"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."

Carlos testimonial
CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes testimonial
boba.tea.vibes

"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."

Andy testimonial
AndySWE-II, Google

"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."

couchpotato99 testimonial
couchpotato99

"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."

Shruti testimonial
ShrutiData Engineer, Salesforce

"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."

midnightramen testimonial
midnightramen

"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."

Bianca testimonial
BiancaFrontend Eng, Figma

"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."

tambrahm007 testimonial
tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa testimonial
toa

"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."

Showing 20 results
Google logo
GoogleMicrosoftMeta

Also asked at Meta, Amazon, Bloomberg

Easy
Software Engineer

Could Each Child Have the Most Candies?

Problem For each child independently, imagine giving that child all extraCandies while leaving every other count unchanged. Return a boolean array ind...

Coding & AlgorithmsArrays & Strings
0
0
7 people solved
DoorDash logo
DoorDash
Medium
Software Engineer Locked

Track the First Unique Restaurant in a Stream

Track integer restaurant IDs in arrival order and answer each query with the earliest value seen exactly once so far, or -1 when no unique value remai...

Coding & Algorithms
6
2
45 people solved
May 26, 2026
Capital One logo
Capital One
Medium
Software Engineer Locked

Design a geography-aware virtual card service

This question evaluates a candidate's ability to design secure, low-latency, geography-aware payment systems, covering distributed systems architectur...

System DesignPayments & Ledgers
77
0
588 people solved
Feb 12, 2026
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Minimize deaths in spreading plant infection

This question evaluates a candidate's ability to model and simulate dynamic grid processes, reason about infection propagation and delayed state chang...

Coding & AlgorithmsSimulation & State Machines
111
0
1171 people solved
Apr 1, 2026
Zomato logo
Zomato
Medium
Product Manager

Zomato Personalization: Redesigning How the App Suggests Restaurants and Dishes

You are interviewing for a product manager role, and the interviewer asks how you would improve recommendations in Zomato, the food-delivery and resta...

Product Design & StrategyProduct Design & ImprovementPersonalization
0
0
10 people solved
Aug 8, 2026
Databricks logo
Databricks
Hard
Software Engineer

Design a thread-safe bounded queue

Design a Thread-Safe Bounded MPMC Queue with Timeouts and Fairness Context You are building a reusable, in-memory, bounded queue that supports multipl...

System DesignConcurrencyData Structure Design
52
0
701 people solved
Sep 6, 2025
Google logo
GoogleLinkedInOracle

Also asked at Oracle, Amazon, Flipkart, Salesforce

Medium
Software Engineer

Group Binary Tree Leaves by Removal Round

Group Binary Tree Leaves by Removal Round Given the root of a binary tree, repeatedly collect all current leaves, then remove those leaves. Continue u...

Coding & AlgorithmsTreesBacktracking & Recursion
1
0
14 people solved
Apple logo
Apple
Medium
Software Engineer

Give a Kubernetes Pod a Token to Call an External Service Securely

An application running in a Kubernetes pod has to call an external service, outside the cluster, that authenticates every request with a token. How do...

Software Engineering FundamentalsApplication SecurityContainers & Orchestration
2
0
21 people solved
Jul 3, 2026
Amazon logo
AmazonSnowflakeGoogle
Hard
Software Engineer

Minimum Semesters with Prerequisites and a Course Limit

Problem Courses are labeled 1..n. Each relation[prev,next] requires prev to be completed in an earlier semester than next. Take at most k courses per ...

Coding & AlgorithmsDynamic ProgrammingBit Manipulation
1
0
11 people solved
Stripe logo
Stripe
Medium
Software Engineer

Design payment-to-invoice matcher with priorities

Design and implement a payment-to-invoice matcher. Inputs: (a) invoices, a list like ["invoice-id-1, 10000, 2022-01-01", "invoice-id-2, 30000, 2022-01...

Data Manipulation (SQL/Python)
28
0
201 people solved
Sep 6, 2025
Medium
Software Engineer Locked

Test Severity Filtering with Contract-Distinguishing Cases

Test severity filtering with independent expected results, inclusive boundaries, misleading message text, missing fields, empty records, and preserved...

Software Engineering FundamentalsTesting & Quality
1
0
13 people solved
Sep 16, 2026
Whatnot logo
Whatnot
Medium
Software Engineer

Build a Tic-Tac-Toe App

Implement a simple Tic-Tac-Toe mobile app that can be completed in a 45-minute coding interview. Requirements: - Display a 3x3 board. - Support two lo...

Coding & Algorithms
7
0
118 people solved
Jan 24, 2026
Voleon logo
Voleon
Medium
Site Reliability Engineer Locked

Count Palindromic Substrings by Expanding Around Centers

Count every contiguous palindromic substring occurrence in a string, treating equal text at different positions as separate results. Include single ch...

Coding & Algorithms
14
0
155 people solved
Aug 10, 2026
Snapchat logo
Snapchat
Hard
Machine Learning Engineer Locked

Find the Smallest Range Covering K Sorted Lists

Find the narrowest inclusive range containing at least one value from each of several sorted integer lists. The prompt defines duplicate handling, neg...

Coding & Algorithms
10
0
91 people solved
Aug 28, 2026
Microsoft logo
MicrosoftGoogleAmazon

Also asked at Amazon, Meta, Bloomberg

Easy
Software Engineer

Match the Diabetes Prefix at a Space-Delimited Condition Boundary

Problem Return patient_id, patient_name and conditions for patients with a condition code beginning DIAB1. Conditions contains zero or more codes sepa...

Data Manipulation (SQL/Python)SQL
0
0
6 people solved
Marshall Wace logo
Marshall Wace
Medium
Software Engineer

Compute max events in any 60-second window

Design a function that, given a non-decreasing list of integer timestamps (seconds), returns the maximum number of events occurring within any contigu...

Coding & AlgorithmsTwo Pointers & Sliding Window
37
0
296 people solved
Aug 13, 2025
LinkedIn logo
LinkedIn
Hard
Software Engineer Locked

Reduce Stale Listings in a Job Marketplace

Design an auditable system that scores stale job listings from mixed-source evidence and applies graduated, reversible actions with employer appeals.

System Design
5
0
102 people solved
Sep 1, 2026
Roblox logo
Roblox
Medium
Software Engineer

Can the character reach the destination?

You control a character starting at a start cell and want to reach a target cell in a 2D grid. Some cells are blocked by obstacles and cannot be enter...

Coding & AlgorithmsGrids & Matrices
27
0
282 people solved
Dec 21, 2025
Google logo
GoogleBarclaysTeradata

Also asked at Teradata, Zeta Global, Meta, Microsoft, Amazon, PhonePe

Hard
Software Engineer

Maximize the Score from Removing Equal-Color Runs

Problem Given the sequence boxes, repeatedly remove a contiguous nonempty run of k boxes of one color and earn k*k points. Remaining boxes close the g...

Coding & AlgorithmsDynamic Programming
0
0
12 people solved
Atlassian logo
Atlassian
Medium
Software Engineer Locked

Diagnose why a scaled system became slow

This question evaluates proficiency in diagnosing performance regressions in scaled production services, emphasizing observability, bottleneck identif...

System DesignReliability & SREObservability
70
0
573 people solved
Jan 22, 2026
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